膦与乙炔的反应。十四。同分异构体:由三芳基膦和二甲基乙酰二羧酸酯合成的2加合物。一个cyclopentenylidenephosphorane

Journal of The Chemical Society C: Organic Pub Date : 1971-01-01 DOI:10.1039/J39710001620

N. Waite, J. Tebby, R. Ward, M. Shaw, Dudley H. Williams

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引用次数: 9

摘要

三苯基膦与过量的二甲基乙炔二羧酸盐反应，除生成2h -磷酸(V)孔(1)外，还生成第二个产物——环戊二烯二磷酸(2)。将(2)还原为二氢化合物(7)，然后碱催化甲醇消除，生成环戊二烯二磷酸(8)。讨论了这些化合物的红外、紫外、新核磁共振和质谱。

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Reactions of phosphines with acetylenes. Part XIV. Isomeric 1 : 2 adducts from triarylphosphines and dimethyl acetylenedicarboxylate. A cyclopentenylidenephosphorane

The reaction of triphenylphosphine and an excess of dimethyl acetylenedicarboxylate gives in addition to the 2H-phosph(V)ole (1), a second product—the cyclopentenylidenephosphorane (2). Reduction of (2) to the dihydro-compound (7) followed by base-catalysed elimination of methanol, gives the cyclopentadienylidenephosphorane (8). The i.r., u.v., n.m.r., and mass spectra of these compounds are discussed.

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Journal of The Chemical Society C: Organic

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